Lock.



H. R. GILSON.

LOCK.

APPLICATION FILED AUG. 5, 1912.

. 1 071 999 Patented Sept. 2, 1913.

8, 21M) INVENTOH 0%), dmuuw Maud 61 UNITED STATES PATENT OFFICE.

HENRY R. GILSON, OF IBA'DEN, I'ENNSYLVANIA, ASSIGNOR T0 NATIONAL METAL MOLDING COMPANY, OF PITTSBURGH, PENNSYLVANIA, A CORPORATION OF PENN- SYLVANIA.

LOOK.

Specification of Letters Patent.

Patented Sept. 2. 1913.

To all whom it may concern:

Be it known that I, HENRY R. GILBON, residing at Baden, in the county of Beaver and State of Pennsylvania, a citizen of the United States, have invented or discovered certain new and useful Improvements in Locks, of which improvement the follow ing isa-specification.

The object of the invention described herein is to provide a lock, which will be simple and efficient, which may be manufactored cheaply, and which maybe easily attached to a hinged member.

In the accompanying drawing, which ,forms part of this specification, I have illustrated the preferred form of my improved lock as applied to a lid of a junction box for electrical conductors.

Figure 1 of the drawing is a bottom plan view of a portion of a junction-box wall and lid, the lock being secured to the lid; and Fig. 2 is a sectional view taken on the broken line II--II, Fig. 1.

' Like numerals are used to designate like parts.

The junction box wall is indicated at 1, and a lid 2, hinged at the right (as viewed in the drawing), closes the opening in such box. The lock, which is secured to the lid 2, consists of a locking-member 3, a spring 4, having one end secured to said locking member, and an abutment 5 fixed upon said -lid 2 and to which the other end *of said spring 4 is attached. a

The locking-member 3 is an integral structure, preferably a small casting, so formed as to have a tongue-like extension 6, beveled at its outer edge 12; a sleeve 7, around which the spring 4 is coiled; and a plate 8, adapted to bear against the lid 2, and having projections orstops 9 and 9. The said locking-member is preferably provided with a central opening 10 adapted to receive a securing member, such as the screw 11, which screw is rigidly secured to the locking member by upsetting the end thereof, and which is pivotally mounted in the lid 2.. In order to prevent the head of the screw 11 from binding the locking-member 3 too tightly upon the lid 2, a ring 13 is formed adjacent to the plate 8; such ring being slightly thicker than the thickness of the lid 2. Also the edge-engaging face of the tongue 6 is beveled, as indicated at 14, so as to bring the lid,firmly in engagement with the edge of the box. The spring f1, which is secured at one end to the lockng-member, coiled about the spring-- receiving sleeve 7 of said locking-member and secured at its other end to the abutment- 5, which is secured to the lid 2 so as to be within the range of engagement of the stops 9 and 9.

In the proportioning and arranging of the several parts, the tongue 6 in its normal position preferably extends at an angle to the straight edge of the box 1, rather than being perpendicular thereto; and the stop 9 is in such position as to hold the tongue in its said normal position. The stop 9 is provided in order to prevent breaking the spring 4: by too great a turning of the lock ing member in a right-handed direction. When the lid 2 is closed the beveled edge of the tongue 6 strikes against tlie box 1 and causes the locking member to rotate in a right handed direction against the tension of the spring 4, which, when the lid is in closed position, causes the locking member to return to its normal position, the tongue 6 then engaging the edge of the box 1.

In order to release the lock a screw driver or any other suitable article may be placed in the slot of the screw 11 and turned in the proper direction. The use of a screw for a combined securing and manipulating member is particularly desirable as a blind when the lock is used on boxes located in public places. I

It will be observed of the lock described above that it comprises a minimum of pieces, and may therefore be cheaply manufactured. Furthermore the lock may be easily secured to a hinged lid or door.

I claim as my invention:

1. The combination with the casing of a structure, and a lid closing an opening therein; of a locking-member having an extending beveled tongue, a spring-receiw ing sleeve and a stop plate all formed into an integral structure, an abutment secured to said lid within range of engagement by said stop plate, a spring coiled around said sleeve and connected to said abutment and to said locking member, said spring adapted to hold the stop plate of said locking member yieldingly in engagement with said abutment, and means for securing said locking member to said lid.

2. The combination with the edge of a curing said locking member to said lid andfor manipulating said member.

3. The combination with the straight edge of a fixed structure, and a hinged lid closing an opening in such structure, of an integrally-formed pivoted locking-member consisting of a bevel-edge tongue extending at an angle to the said edge of the structure a spring-receiving sleeve and a stop plate having projections thereon, an abutment secured to the said hinged lid and within range of operative engagement by said stop plate, a spring secured to said fixed abutment andsurrounding said spring-receiving sleeve, and a screw extending loosely through the said lid and rigidly fixed to the said locking member, the said screw se-.

curing the said locking member to said lid.

4. The combination with a casing having an opening therein and a movable closure for said opening, of a locking member ivoted to said closure and consisting 0 an extended beveled tongue and a stop element, an abutment secured to said closure within range of engagement by said stop element,

a spring secured to said locking member and to said abutment, said spring being effective to hold said stop yieldingly against said abutment.

In testimony whereof I have hereunto set my hand. Y

, HENRY R. GILSON.

' Witnesses:

PAUL N. CRIToHLow, FRANCIS J. TOMASSON. 

